Fear is not an instinct. Fear is learned after pain. Curiosity and awareness are instincts, and will protect much better than fear, while still allowing for trust, and the joyful experiences that fear would only push away.
I must not fear. Fear is the mind-killer. Fear is the little-death that brings total obliteration. I will face my fear. I will permit it to pass over me and through me. And when it has gone past I will turn the inner eye to see its path. Where the fear has gone there will be nothing. Only I will remain.